Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d1338ee46b176ed…

MALICIOUS

PDF

87.2 KB Created: 2021-02-07 08:46:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8d815b17efe580c758cd43cb4d35231b SHA-1: 094bdcbac0612958503a831d4bfedcec4c49fc33 SHA-256: 5d1338ee46b176ed921dcbe2a2d95b05a565118b8ec852e7b4b3a98458073168
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jottigo.ru/aws?utm_term=past+tense+english+worksheets+pdf PDF link annotation
    • https://cdn.sqhk.co/niporatibu/aicjigj/medinirub.pdfIn PDF document text
    • http://reduslim-shopofficial.site/mizerak_chicagoan_pool_table_manual66ar0.pdfIn PDF document text
    • https://cdn.sqhk.co/kuxefoxo/g9hghaC/vavewajuguxerebuzama.pdfIn PDF document text
    • http://gbo.guru/risuluzerasabigobisamovpc6hk.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/gXI358X/24464887829.pdfIn PDF document text
    • https://cdn.sqhk.co/vopovaroxamo/1H7Ee8G/golotugewur.pdfIn PDF document text
    • http://lalexejiwisejul.iblogger.org/pedekefujanibofufolali.pdfIn PDF document text
    • https://cdn.sqhk.co/wunasesev/jhcvHHP/flame_hero_mod_apk_unlimited_money_and_gems.pdfIn PDF document text
    • http://gelumagiz.iblogger.org/bowoxapokogigisovid.pdfIn PDF document text
    • http://parralax.net/road_revenge_car_shooting_gamesdvj0a.pdfIn PDF document text
    • http://domastmsk.space/percent_off_calculator_canadaaxepk.pdfIn PDF document text
    • http://reggis.info/multiplying_complex_numbers_in_cartesian_formpqi6e.pdfIn PDF document text
    • https://cdn.sqhk.co/kogeledewafo/xhNwkij/pico_iyer_where_is_home.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/gflhhgg/xibemu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nokefibazapowem.rf.gd/brighthouse_financial_annuity_forms.pdfIn PDF document text
    • http://mudasaki.epizy.com/amalgamation_and_absorption_accounting.pdfIn PDF document text
    • http://lunijikujapike.epizy.com/adobe_air_para_pc.pdfIn PDF document text
    • http://gukupexokopiwug.epizy.com/sql_server_management_studio_2016.pdfIn PDF document text
    • http://bibobega.epizy.com/bhima_nadi_information.pdfIn PDF document text
    • http://gonoluripep.rf.gd/70946057587.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D6 5248 bytes
SHA-256: 4d1f7215feaad8a6c0cff62570af0ce39ef1c100e3b660e035e7a569d6380374
font_01_sfnt_off000102ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AC 11792 bytes
SHA-256: df0b288da97a351a85291112f3250d6421ebaa3cbd31aa1d7286ccff4f39b95a
font_02_sfnt_off00012a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A88 16060 bytes
SHA-256: df1d2c903cabdf2976887e260da0b25217edeb5ce2b71f315001024534e8e210
font_03_sfnt_off00013f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F1E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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